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Sequential access detection system and method

A technology for accessing units and files, which is applied in the field of sequential access detection systems to save time and space and reduce the number of writes

Inactive Publication Date: 2015-04-29
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, additional data structure and calculation time are required

Method used

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  • Sequential access detection system and method
  • Sequential access detection system and method
  • Sequential access detection system and method

Examples

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Embodiment Construction

[0016] Such as figure 1 Shown is a schematic diagram of the application environment of the sequential access detection system of the present invention. In this embodiment, the sequential access detection system 20 (hereinafter referred to as "system 20") operates in an electronic device 2 to detect whether the access unit to be accessed is a serial access file (ie, sequential IO file). The electronic device 2 also includes a storage device 21 and a display device 22 connected through signal lines and data lines. It can be understood that the electronic device 2 should further include other necessary components, such as batteries. The storage device 21 also includes a storage type flash memory (NAND flash).

[0017] When an access file needs to be accessed, the system 20 first divides the access file into multiple fragments (ie, access units). When the access file is a continuous access file, the system 20 divides each The access unit is marked (the specific process is as f...

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Abstract

The invention provides a sequential access detection system and method; the method comprises the following steps: judging that whether an access unit is a part of a consecutive access file when an access unit of the access file is received by an NAND flash terminal of an NAND Flash disk; marking a sequential access sign corresponding to the access file as a sequential access task when the access unit is a part of the consecutive access file. The sequential access detection system and method has the advantages that the restriction on write-in frequency of an NAND flash sector can be reduced, so that a great amount of time and space required by specific statistics can be saved.

Description

technical field [0001] The invention relates to the technical field of data access, in particular to a sequential access detection system and method. Background technique [0002] In computer systems, disk IO management is the key to system performance. On the emerging storage type flash memory disk (NAND flash disk), due to its high-speed read and write speed, it can significantly improve the performance of the computer system, so it has begun to be valued by the database system. However, although NAND flash reads and writes several times faster than a disk, due to its physical limitations, the sector of NAND flash has a limit on the number of times it can be written (up to 100,000 times). [0003] Although the read and write efficiency of NAND flash for random IO is much higher than that of disk, its read efficiency for continuous IO can be equaled by a Redundant Array of Independent Disk (RAID) system with multiple hard disks. In order to save the precious limit on the ...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F17/30
Inventor 邱俊谐郑祥廷
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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